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iPod only powers on from power adapter, not computer. Battery?

Hi!

I am experiencing problems with my iPod touch 4G.

-When plugged into power adapter it turns on and seems to function correctly.

-When I unplug it, it instantly dies and will not turn on (though it shows full charge).

-I have attempted connecting it to the computer via the same cord through USB and it will not boot up and thus not recognize.

Is this a problem with the logic board or the battery? Do you think replacing the battery would rectify this problem?

I am an experienced user, have repaired macs and iPods and this one has me puzzled. Please let me know any input and I will update as I continue, thanks!

I have tried resetting while its powered from adapter and unplugging, same problem.

I would like to restore it, but cannot do so as it is locked by a passcode I don't know and can't connect it to the computer for power. Any suggestions are appreciated.

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The logic boards come with the batteries. They are tuned for the cells they are on and can not be swapped because once they are disconnected it will disable the battery. This is why li-ion batteries lose the charge if they sit. The logic board is always active, so it will always be on discharging the battery at 10% per 20-30 day period. The reason for the logic's is a safety thing. If the cells overheat the cells can explode and hurt you. So the charge controller monitors this along with the max amount of charge cycles. Regardless of how many amps are still on the cells it will disable after the factory stated safe charge count.

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yes battery. The battery logic board is bad or detected a (undervolt/overheat/charge count reached) then disabled battery.

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Thanks for you input Jay, would your recommend changing the battery logic board or the battery itself? I charged it overnight to see if any kind of results would come of it, but it just kept restarting and when I checked in the morning it showed low battery charge in red. I can get it in DFU mode, however this is only when plugged in and obviously doesnt help much when I unplug it as it dies.

Thanks again!

von

are you saying it's the battery because of the fact that it displays a charged battery? i've seen this many times but can't tell wether it's the board or the battery except by trial and error.

von

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ughh this happened to me too and i don't know what to do but i really really really want it to be fixed....

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this is a 2 year old question. My advice to you would be to either ask your own question, or resolve your problem by changing your battery first:-)

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Same problem with my iPod too.

Please someone give suggestions.

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Syl2us wird auf ewig dankbar sein.
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